diff --git a/Library/Homebrew/os/mac/xcode.rb b/Library/Homebrew/os/mac/xcode.rb
index 6b30e96bb9..ed4882f2c6 100644
--- a/Library/Homebrew/os/mac/xcode.rb
+++ b/Library/Homebrew/os/mac/xcode.rb
@@ -22,7 +22,8 @@ module MacOS::Xcode extend self
     when "10.4"         then "2.5"
     when "10.5"         then "3.1.4"
     when "10.6"         then "3.2.6"
-    when "10.7", "10.8" then "4.6.3"
+    when "10.7"         then "4.6.3"
+    when "10.8"         then "5.0"
     when "10.9"         then "5.0"
     else
       # Default to newest known version of Xcode for unreleased OSX versions.